diff options
| -rw-r--r-- | include/linux/ipv6.h | 3 | ||||
| -rw-r--r-- | net/ipv6/exthdrs.c | 84 |
2 files changed, 86 insertions, 1 deletions
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index 5bf4406..db3b2ba 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -226,6 +226,9 @@ struct inet6_skb_parm { __u16 dst0; __u16 srcrt; __u16 dst1; +#ifdef CONFIG_IPV6_MIP6 + __u16 dsthao; +#endif __u16 lastopt; __u32 nhoff; __u16 flags; diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c index 1cdd0f0..6a6466b 100644 --- a/net/ipv6/exthdrs.c +++ b/net/ipv6/exthdrs.c @@ -196,8 +196,80 @@ bad: Destination options header. *****************************/ +#ifdef CONFIG_IPV6_MIP6 +static int ipv6_dest_hao(struct sk_buff **skbp, int optoff) +{ + struct sk_buff *skb = *skbp; + struct ipv6_destopt_hao *hao; + struct inet6_skb_parm *opt = IP6CB(skb); + struct ipv6hdr *ipv6h = (struct ipv6hdr *)skb->nh.raw; + struct in6_addr tmp_addr; + int ret; + + if (opt->dsthao) { + LIMIT_NETDEBUG(KERN_DEBUG "hao duplicated\n"); + goto discard; + } + opt->dsthao = opt->dst1; + opt->dst1 = 0; + + hao = (struct ipv6_destopt_hao *)(skb->nh.raw + optoff); + + if (hao->length != 16) { + LIMIT_NETDEBUG( + KERN_DEBUG "hao invalid option length = %d\n", hao->length); + goto discard; + } + + if (!(ipv6_addr_type(&hao->addr) & IPV6_ADDR_UNICAST)) { + LIMIT_NETDEBUG( + KERN_DEBUG "hao is not an unicast addr: " NIP6_FMT "\n", NIP6(hao->addr)); + goto discard; + } + + ret = xfrm6_input_addr(skb, (xfrm_address_t *)&ipv6h->daddr, + (xfrm_address_t *)&hao->addr, IPPROTO_DSTOPTS); + if (unlikely(ret < 0)) + goto discard; + + if (skb_cloned(skb)) { + struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); + if (skb2 == NULL) + goto discard; + + kfree_skb(skb); + + /* update all variable using below by copied skbuff */ + *skbp = skb = skb2; + hao = (struct ipv6_destopt_hao *)(skb2->nh.raw + optoff); + ipv6h = (struct ipv6hdr *)skb2->nh.raw; + } + + if (skb->ip_summed == CHECKSUM_COMPLETE) + skb->ip_summed = CHECKSUM_NONE; + + ipv6_addr_copy(&tmp_addr, &ipv6h->saddr); + ipv6_addr_copy(&ipv6h->saddr, &hao->addr); + ipv6_addr_copy(&hao->addr, &tmp_addr); + + if (skb->tstamp.off_sec == 0) + __net_timestamp(skb); + + return 1; + + discard: + kfree_skb(skb); + return 0; +} +#endif + static struct tlvtype_proc tlvprocdestopt_lst[] = { - /* No destination options are defined now */ +#ifdef CONFIG_IPV6_MIP6 + { + .type = IPV6_TLV_HAO, + .func = ipv6_dest_hao, + }, +#endif {-1, NULL} }; @@ -205,6 +277,9 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp) { struct sk_buff *skb = *skbp; struct inet6_skb_parm *opt = IP6CB(skb); +#ifdef CONFIG_IPV6_MIP6 + __u16 dstbuf; +#endif if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) || !pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) { @@ -215,11 +290,18 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp) opt->lastopt = skb->h.raw - skb->nh.raw; opt->dst1 = skb->h.raw - skb->nh.raw; +#ifdef CONFIG_IPV6_MIP6 + dstbuf = opt->dst1; +#endif if (ip6_parse_tlv(tlvprocdestopt_lst, skbp)) { skb = *skbp; skb->h.raw += ((skb->h.raw[1]+1)<<3); +#ifdef CONFIG_IPV6_MIP6 + opt->nhoff = dstbuf; +#else opt->nhoff = opt->dst1; +#endif return 1; } |
